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JEE Main levelSingle correct optionDifficulty 2 of 3bn195

What is the Stock name of $Hg X_{2} Cl X_{2}$ (contains the $Hg X_{2} X^{2 +}$ ion)?

Adimercury dichloride
Bmercury(II) chloride
Cmercury(I) chloride
Ddimercury(II) chloride

Answer: C

Hg X_{2} X^{2 +}

has two Hg atoms sharing a +2 charge, so each Hg is +1. The compound is mercury(I) chloride.

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